An old man explained to me, “The spirits of dead persons are afflicting such sufferers. These kehua control them. If the afflicted person survives he will be the medium of that [evil] spirit. Some people become demented when so affected.”

1924, Elsdon Best, Māori Religion and Mythology: being an account of the cosmogony, anthropogeny, religious beliefs and rites, magic and folk lore of the Māori folk of New Zealand, Part 2, 2005, Te Papa Press, page 42,

The other aspect of the "etheric double" of the theosophist, that is the wraith or apparitional spirit seen after the death of the body, is the kehua of the Maori.

2) Used only with a possessive suffix; this is the form for the third-person singular and third-person plural.3) Does not exist in the case of intransitive verbs. Do not confuse with nouns formed with the -ma suffix.